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Hans Wennborg 0f9ab4fff1 clang-cl: Warn about /U flags that look like filenames (PR31662)
Both on Mac and Windows, it's common to have a 'Users' directory in the
root of the filesystem, so one might specify a filename as
'/Users/me/myfile.c'. clang-cl (as well as MSVC's cl.exe) will interpret
that as invoking the '/U' option, which is probably not what the user
wanted. Add a warning about this.

Differential Revision: https://reviews.llvm.org/D29198

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@293305 91177308-0d34-0410-b5e6-96231b3b80d8
2017-01-27 17:09:41 +00:00
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